Earth-auger.



PATENTED OCT. 16, 1906.

C. L. TUTTLE. EARTH AUGER.

APPLICATION FILED JAN. 22, 1906.

mm w d MW v UNITED STATES & CHARLES L. TUTTLE, OF ROCHESTER;

NEWV YORK.

EARTH-AUGER.

Specificationof Letters Patent.

Patented Oct. 16, 1906.

Application filedJanuery 22, 1906. Serial No. 297,305.

To all whom it may concern:

Be it known that I, CHARLES L.-TUTTLE,

of Rochester, in the county of Monroe and State of New York, haveinvented anew and useful Improvement in Earth-Angers, which improvementis fully set forth in the following specification and shown in theaccompa- .nying drawings. 1

My present invention is intended as an improvement upon the post-holeaugur shown and described in Letters Patent No. 645,222, issued to meMarch 13, 1900.

The improved earthauger herein shown and set forth is more simple inconstruction than the one described in said Letters Patent, moredurable, and less liable to break or give out at the lower part of theshaft. One object of my present invention is to construct the anger withparts more simple and durable than shown in said Letters Patent.

Another object of the invention is to construct the spiral draw-bit witha quick twist and independent of the shaft and pass it upwardly throughthe head of the auger and connect it with the shaft above the head.

Other objects and advantages of the invention will be brought out andmade to appear in the following specification and the novel constructionmore particularly pointed out in the appended claims, reference beinghad to the accompanying drawings, which, with the reference charactersmarked thereon, form a part of this specification.

Figure 1 is a plan of the auger with the shaft transverselysectioned anda part broken away. Fig. 2 is a view of the auger from beneath. Fig. 3is a side elevation of the device seen as indicated by arrow 3 in Fig.1, a part being shown in two positions by full and dotted lines. Fig. 4is a side elevation seen as indicated'by arrow 4 in Fig. 1, a part beingaxially sectioned and a part broken away. Fig. 5 shows the gimlet-pointor hit and the head-bar, with other parts omitted, parts being brokenaway and centrally longitudinally sectioned. Fig. 6, drawn to a smallscale, shows the upper end ofthe shaft and the handle, parts beingbroken away and longitudinally sectioned.

Referring to the drawings, G represents the head of the auger, it beingsubstantially circular in plan, comprising a horizontal head-bar Adiametrically disposed. To the under flat surface of the head-bar and atthe end portions thereof are secured by bolts (1 bar A and has twooppositely-disposed horizontal blades or cutters B3. The bar'A iscommonly formed. with a hub b, pierced centrally by the bit C, which isthreaded in the bar, so as to be aXial-withthe head G and longitudinallyadjustable therein. The bit extends above the upon its upper end aninternally-threaded coupling or sleeve d, adapted to receive within itsupper end the lower. threaded end of'a stale or shaft D for turning theaugur. The shaft D is hollow, as of gas-pipe, and of a length tohave'its upper end in convenient reach of the operator, the up er endbeing provided with a horizontal ho ow handle T, Fig. 6, similar to thatshown in said Letters Patent, for turning the auger. The shaft D and thebit O are coa'xial and have their adjacent ends closely abutting withinthe sleeve d, as clearly shown in Fig. 4, the said threaded parts A, C,d, and D being firmly screwed together or so rigidly turned against oneanother as to constitute practically a single solid piece.

Above the cutters B B are placed a pair of sectoral quadrantal plates EE, Fig. 3, alternated with the cutters in the plane of the head G, theplates overlapping at their edges the cutting edges of the blades. Thereare spaces 0 s between the plates and the associated cutters, the platesbeing straight or flat and held to the upper side of the bar A by hingese e, Figs. 1 and 4, on opposite sides of the bit 0. The cutters areformed at their extreme outer edges with upturned lips f f, Figs. 1, 3,and 4, upon which the respective plates E 'E rest at their outer edges,as shown.

The bit O is made hollow at its upper threaded end, as clearly shown inFig. 5, which, with the hollow shaft D, forms a passage for the downflowof air through them, opening out through perforations 9 (see also Fig.3) in the bit below the head G. This is to assist when withdrawing theloaded auger from the hole formed in the ground. The spiral-pointed endof the bit is also formed thin and fiat and with a quick turn or twist,as shown, which serves better to draw the auger downward when boringthan the slow threaded conical point employed in the auger shown and setforth in the Letters Patent above mentioned. This flattened form of thespiraled part of the bit, with rapid lead of twist, causes the bit tohold within its open roomy spirals a large mass of earth and so get abetter hold upon the ground when boring.

' What I clairn as my invention, and desire to secure by Letters Patent,is

1. An earth-auger comprising a circular head having a diametral bar withcutters secured thereto, and plates held by the bar overlapping thecutters, the vbar having an axial threaded opening, and a spiral bitwith threaded portion projecting upwardthrough the bar, a threadedsleeve on the bit above the bar, and a shaft with threaded end insertedin the sleeve, the ends of the shaftand the bit abutting above saidzbar,and ahandle on the shaft.

2. An earth-auger comprising a circular head havin a diametral bar withaxial opening, a spira bit threaded through said opening, a sleeve onthe bit and a shaft in the sleeve coaxial with the bit and abuttingthereagainst, said bar, the shaft, the sleeve and the bit being joinedrigidlyas a single body, apair of sectoral cutters secured to the underside of thebar on either side oft-he bit, and a pair of straightsectoralplates secured movably on the upper side of the bar on either side ofthe bit and resting upon .portions of the respective cutt'ers,and ahandle for the shaft, there being a passage for the flow of air throughtheshaftand associated parts, leading out'beloWthehead.

3. An earth-auger having a circular head with a diametric bar, a pair ofcutters secured to the under surface of said bar, a pair of sectoralquadrantal plates secured to the upper face of saidbarabove the cuttersand at their edges overlapping the cutting edges of the cutters withspaces between said plates and cutters, said cutters being formed attheir extreine outer edges with which said plates at their outer edgesrest, hinges connecting said plates to the bar, a sleeve, a bit having aspiral point and a threaded portion engaged in said bar and sleeve, andahandle having a threaded shaft engaged in said sleeve.

In witness whereof I. have hereunto set my hand, this 18th day ofanuary, 1906, in the presence of two subscribing witnesses.

I CHARLES L. TUTTLE. Witnesses:

.E. B. WHITMORE, A. M. WHITMORE.

upturned lips upon

